TLM Modelling Of Acoustic Devices
Author(s)
W.J. O'Connor & M. Simms
Abstract
The Transmission Line Matrix (TLM) method can be used to solve the wave equation
numerically. It has been applied very widely in electromagnetics, less in acoustics. Propagation
is modelled by pulses travelling through a grid or "matrix" of ideal transmission lines, thereby
discretising the space of interest. During each time increment the pulses are assumed to travel
from node to node in the grid, where they scatter according to a simple pattern. If the mesh is
fine enough, the process models the wave equation.
The focus of this paper is on the TLM modelling of acoustic devices such as
microphones, in which mechanical-acoustic interaction plays a central role. A computer model
of the device is easily built up by combining rectangular TLM "building blocks" or arrays
Keywords
Related Book
Other papers in this volume
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